# Unable to Launch Session of UEFN project due to errors

**URL:** <https://forums.unrealengine.com/t/unable-to-launch-session-of-uefn-project-due-to-errors/2081364>\
**Category:** Issues and Bug Reporting\
**Tags:** fortnite-creative, unreal-editor-for-fortnite, crash, bug-report, fortnite\
**Created:** [October 22, 2024, 11:28pm UTC](https://forums.unrealengine.com/t/unable-to-launch-session-of-uefn-project-due-to-errors/2081364 "2024-10-22T23:28:50Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\
**Post date:** [October 23, 2024, 12:46am UTC](https://forums.unrealengine.com/t/unable-to-launch-session-of-uefn-project-due-to-errors/2081364/2 "2024-10-23T00:46:29Z")

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hi @audieloco  
In the Outliner window type control + a to select all.  
then follow picture

 ![FixValidation](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/9/e/49e43c234948131bad9aadd1718890eae5d9e10c.jpeg)

Fix Validation will attempt to fix problems

Failure again means needing to verify your installation  
[Verify UEFN](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/5)

The try to Fix Validation will attempt to fix problems

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